US3839868A - Vehicle brake apparatus - Google Patents

Vehicle brake apparatus Download PDF

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Publication number
US3839868A
US3839868A US00419273A US41927373A US3839868A US 3839868 A US3839868 A US 3839868A US 00419273 A US00419273 A US 00419273A US 41927373 A US41927373 A US 41927373A US 3839868 A US3839868 A US 3839868A
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US
United States
Prior art keywords
brake
auxiliary circuits
oil pressure
rear wheel
combining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00419273A
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English (en)
Inventor
Y Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Application granted granted Critical
Publication of US3839868A publication Critical patent/US3839868A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L3/00—Brake-actuating mechanisms; Arrangements thereof
    • B62L3/08—Mechanisms specially adapted for braking more than one wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L3/00—Brake-actuating mechanisms; Arrangements thereof

Definitions

  • An object of this invention is to provide apparatus free from the aforementioned defects.
  • Another object is to provide a brake oil pressure system for a front wheel and a brake oil pressure system for a rear wheel so as to be individually operable, and arranged so that when the two systems are simultaneously operated, the oil pressures of the two systems are combined and then distributed in a predetermined ratio before being applied to the front wheel and the rear wheel, respectively.
  • FIG. 1 is acircuit diagram of one embodiment, under an inoperative condition, of the present invention
  • FIG. 2 is a circuit diagram of the arrangement of FIG. 1 under the condition that a rear wheel system alone is operated.
  • FIG. 3 is a circuit diagram of the embodiment of FIG. 1 under the condition that a front wheel system and a rear wheel system are simultaneously operated.
  • reference numerals 1 and 2 denote main circuits constituting a brake oil pressure system for a front wheel and a brake oil pressure system for a rear wheel, respectively.
  • the main circuit 1 has at its input end, a master cylinder 4 with a brake actuator 3 such as a brake lever or the like.
  • Circuit 1 has at its output end, a wheel cylinder 5.
  • the main circuit 2 has at its input end a master cylinder 7 with a brake actuator 6 such as a brake pedal or the like.
  • circuit 2 At its output end, circuit 2 has a wheel cylinder 8, so that if either of the two actuators 3, 6 is actuated, the oil pressure generated thereby is exerted on the corresponding one of the wheel cylinders 5, 8 through the corresponding one of the main circuits 1, 2, and thus braking action is applied to either one of the front and rear wheels.
  • the main circuit 1 is provided with a pair of auxiliary circuits 9, 10 extending from the input and output sides thereof, respectively.
  • a single common control valve 11 is interposed in the main circuit 1 and the auxiliary circuits 9, 10, so that by operation of the valve 11, the main circuit 1 and the auxiliary circuits 9, 10 are selectively opened.
  • the control valve 11 comprises a slidable valve having on its periphery a pair of right and left annular passages 13, 12.
  • the valve is provided at its one end with a spring 14 and at its other end with an oil pressure chamber 15.
  • the oil pressure chamber 15 is in communication with the vicinity of the input end of the other main circuit 2 through a conduit 16, so that in normal operation, the valve 11 is moved to the right by the pushing action of the spring 14 as shown in FIG.
  • the main circuit 2 has a pair of right and left auxiliary circuits 17, 18 extending therefrom.
  • the main circuit 2 and the auxiliary circuits 17, 18 are selectively opened by a single common control valve 19.
  • Reference numerals 20, 21 denote a pair of right and left annular passages formed on the periphery of the valve 19.
  • Reference numeral 22 denotes a spring provided on the left side thereof, whereas reference numeral 23 denotes an oil pressure chamber formed on the right side thereof.
  • Reference numeral 24 denotes a conduit for causing the chamber 23 to be in communication with the other main circuit 1.
  • the auxiliary circuits 9, 17 are arranged to be in communication with the auxiliary circuits 10, 18 through an oil pressure combining circuit 25 and an oil pressure distribution circuit 26.
  • the oil pressure combining circuit 25 comprises a stepped piston 28 within a cylinder 27, and the foregoing auxiliary circuits 9, 17 are in communication with a periphery oil pressure chamber 29 and a central oil pressure chamber 30 formed on one side surface of the piston 28. If, thereby, respective oil pressures are applied to the piston 28 through the auxiliary circuits 9, 17, a combined or resultant oil pressure is generated within an oil pressure chamber 41 on the other side surface thereof.
  • the oil pressure distribution circuit 26 is so constructed that a pair of right and left cylinders 34, 33
  • the left-handed piston 31 is formed of a stepped type piston comprising an inside large diameter piston 31a and an outside small diameter piston 31b.
  • the right-handed piston 32 is formed of a stepless piston equal in diameter to the foregoing large diameter piston 31a.
  • the control valves ll, 19 are open for the main circuits 1, 2 as shown in FIG. 1. if, under these conditions, either of the brake actuators 3, 6 is actuated as, for example actuator 6, the oil pressure generated thereby acts on the wheel cylinder 8 of the rear wheel, through the main circuit 2 as shown in FIG. 2 for braking the rear wheel. Similar results are obtained when the other of the actuators 3, 6, that is, the actuator 3 is actuated, but in this case the front wheel alone is subjected to braking action. It is apparent from FIG. 2, that in these cases either of the control valves ll, 19 is switched. If, the two actuators, 3, 6 are simultaneously actuated, as shown in FIG.
  • the two control valves 19, 11 are both switched, whereby the main circuits 1, 2 are closed and the auxiliary circuits 9, l and 17, 18 are opened.
  • the oil pressures generated by actuators 3, 6 are supplied to the oil pressure combining circuit 25 through the auxiliary circuits 9, 17 for producing a combined oil pressure, and the resultant pressure is then distributed by the oil pressure distribution circuit 26 in a predetermined ratio.
  • the distributed oil pressures are taken from the opposite ends thereof and applied to the wheel cylinders 5, 8 through the auxiliary circuits l0, l8, and thus the front wheel and the rear wheel are given respective braking forces of the predetermined ratio.
  • the front wheel and the rear wheel can be subjected to braking actions either individually or simultaneously.
  • the braking forces are always automatically established to be of a predetermined ratio. in this manner, the aforementioned disadvantage of the conventional case where the ratio depends on the drivers actuating forces, can be avoided.
  • Brake apparatus for a vehicle with front wheel means and rear wheel means comprising, in combination,
  • a first brake oil pressure system connected to said front wheel means
  • a second brake oil pressure system connected to said rear wheel means; said first system and said second system being individually operable;
  • each said system comprises a main hydraulic circuit with master cylinder and brake actuator.
  • the apparatus as defined in claim 2 including auxiliary circuits connected to said main circuit, and a control valve interposed in said main circuit and auxiliary circuits for selectively opening said auxiliary circuits by operation of said valve.
  • control valve comprises a slidable member having a pair of annular passages on its periphery, spring means at one end of said slidable member, and an oil pressure chamber at the other end of said slidable member and communicating with the other main circuit, said slidable member being displaced by said spring means in normal operation of said valve to open the main circuit.
  • the apparatus as defined in claim 4 including pressure combining means connected to said auxiliary circuits, and pressure distributing means connected to said combining means, the auxiliary circuits of both systems being opened and the pressures generated by both systems being combined by said combining means, the combined pressure from said combining means being distributed by said distributing means in predetermined ratio to said front wheel means and said rear wheel means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Regulating Braking Force (AREA)
US00419273A 1972-11-28 1973-11-27 Vehicle brake apparatus Expired - Lifetime US3839868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47118564A JPS5020338B1 (enrdf_load_stackoverflow) 1972-11-28 1972-11-28

Publications (1)

Publication Number Publication Date
US3839868A true US3839868A (en) 1974-10-08

Family

ID=14739703

Family Applications (1)

Application Number Title Priority Date Filing Date
US00419273A Expired - Lifetime US3839868A (en) 1972-11-28 1973-11-27 Vehicle brake apparatus

Country Status (7)

Country Link
US (1) US3839868A (enrdf_load_stackoverflow)
JP (1) JPS5020338B1 (enrdf_load_stackoverflow)
AU (1) AU477233B2 (enrdf_load_stackoverflow)
CA (1) CA1002563A (enrdf_load_stackoverflow)
FR (1) FR2207825B1 (enrdf_load_stackoverflow)
GB (1) GB1449647A (enrdf_load_stackoverflow)
IT (1) IT1000430B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176886A (en) * 1977-06-03 1979-12-04 Watanabe Engineering Co., Ltd. Brake apparatus for motorcycle
FR2441521A1 (fr) * 1978-11-17 1980-06-13 Bosch Gmbh Robert Dispositif de freinage hydraulique pour motocyclettes
US4440452A (en) * 1980-12-24 1984-04-03 Daimler-Benz Aktiengesellschaft Hydraulic brake system for two-wheeled vehicles
US5544946A (en) * 1994-06-14 1996-08-13 Honda Giken Kogyo Kabushiki Kaisha Motorcycle braking system and method
US6238017B1 (en) * 1997-10-03 2001-05-29 Frederick G. Eitel Advanced motorcycle chassis and braking system
US6409285B1 (en) * 1999-03-17 2002-06-25 Honda Giken Kogyo Kabushiki Kaisha Front wheel and rear wheel interlocking brake system for motorcycle
CN101085617B (zh) * 2006-06-09 2010-05-12 株式会社岛野 自行车液压制动驱动装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2731201C2 (de) * 1977-07-11 1983-12-08 Alfred Teves Gmbh, 6000 Frankfurt Druckmittel-Bremssystem für Motorräder
DE2743204C2 (de) * 1977-09-26 1984-02-23 Alfred Teves Gmbh, 6000 Frankfurt Bremskraftregler für ein hydraulisches Motorrad-Bremssystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526968A (en) * 1945-11-08 1950-10-24 George W Pontius Brake pressure selector device
US2984071A (en) * 1959-05-11 1961-05-16 Carl T Olson Safety device for hydraulic brakes
US3393945A (en) * 1966-06-10 1968-07-23 Bendix Corp Fluid pressure delivery valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526968A (en) * 1945-11-08 1950-10-24 George W Pontius Brake pressure selector device
US2984071A (en) * 1959-05-11 1961-05-16 Carl T Olson Safety device for hydraulic brakes
US3393945A (en) * 1966-06-10 1968-07-23 Bendix Corp Fluid pressure delivery valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176886A (en) * 1977-06-03 1979-12-04 Watanabe Engineering Co., Ltd. Brake apparatus for motorcycle
FR2441521A1 (fr) * 1978-11-17 1980-06-13 Bosch Gmbh Robert Dispositif de freinage hydraulique pour motocyclettes
US4440452A (en) * 1980-12-24 1984-04-03 Daimler-Benz Aktiengesellschaft Hydraulic brake system for two-wheeled vehicles
US5544946A (en) * 1994-06-14 1996-08-13 Honda Giken Kogyo Kabushiki Kaisha Motorcycle braking system and method
US6238017B1 (en) * 1997-10-03 2001-05-29 Frederick G. Eitel Advanced motorcycle chassis and braking system
US6409285B1 (en) * 1999-03-17 2002-06-25 Honda Giken Kogyo Kabushiki Kaisha Front wheel and rear wheel interlocking brake system for motorcycle
CN101085617B (zh) * 2006-06-09 2010-05-12 株式会社岛野 自行车液压制动驱动装置

Also Published As

Publication number Publication date
DE2357898B2 (de) 1975-07-31
DE2357898A1 (de) 1974-06-12
FR2207825B1 (enrdf_load_stackoverflow) 1976-10-01
JPS5020338B1 (enrdf_load_stackoverflow) 1975-07-14
GB1449647A (en) 1976-09-15
FR2207825A1 (enrdf_load_stackoverflow) 1974-06-21
AU6273773A (en) 1975-05-22
AU477233B2 (en) 1976-10-21
CA1002563A (en) 1976-12-28
IT1000430B (it) 1976-03-30

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